Drawing instrument



March 2 1926. 4

, A. T. JESPERSEN DRAWING INSTRUMENT Filed June 4, 1924 IN V EN TOR A.uga en,

WITNESSES A TTORNE YS etc.

Patented Mar. 2, 1926.

ASKET| THEODOR JESPERSEN, OF OMAHA, NEBRASKA DRAWING INSTRUMENT.

Application filed June 4,

To all whom it may concern:

I Be it known that I, AKsEL THEODOR J ES- PERSEN, a citizen of theUnited States, and resident of Omaha, in they county of Douglas andState of Nebraska, have invented certain new and useful Improvements inDrawing Instruments, of which the following is a specification. I

This invention relates to improvements in -drawing instruments and itconsists of the constructions, combinations and arrangements hereindescribed and claimed.

An object of the invention is to provide an instrument for making. dotseither in relatively broad bands or otherwise, depending on the sizeofdot roller employed, the instrument being adaptable for use bydraft'smen, engineers, lithographers, artists and others having use foran instrument of this particular type. I

Other objects and advantages appear in the following specification,reference being had to the accompanying drawing, in which Figure 1 1s aside elevatlon of theimsf proved drawing instrument.-

Figure 2 is a plan view thereof.

Figure 3 is an inverted plan view.

Figure 4 is a side elevation ofthe head of the instrument, shown on alarger scale than Figure 1.

Figure 5 is a front elevation.

In carrying out the invention, the improved instrument is made toinclude a handle 1 and a head'generally designated 2. The handle 1 isenlarged at 3 (Figs. 2 and 3) to provide a support for the spaced sideplates 4. These side plates are permanently secured to the enlargement 3by suitable means 5 which may consist of riv ets, screws,

The side plates 4 are connected by a bridge 6 (Figs. '2, 4 and 5) whichconnect the free ends and holdthem in proper spaced relationship,Stamped ears 7 provide means by which springs 8 are held in place on therespective sides of the headi2. The ears 7 are clamped down upon thesprings so as to fix them in position uponthe side plates 4.

Each side plate has slots 9 and 10. These are arranged in transversealignment in order to provide true hearings or supports for the shafts11 and 12 of the dot and inking rollers 13 and 14 respectively. Thesprings 8 are of substantial inverted U-shape, one leg of each, however,having a forwardly extendingarm 15 for thepurpose of sup- 1924. SerialNo. 717,778.

porting the shaft 11 in its bearings 9. The

other leg 16 of each spring is substantially straight, and exerts aforward pressure on the shaft 12 of the inking roller so as to keep saidshaft in place in its bearings 10.

The ends of the springs are bent slightly downward to provide a moreconvenient place to apply linger pressure when removing either the dotor inking roller 13 and 14. lnk is supplied to the roller 13 by theholder 17. This holder terminates in a curved por tion 18 at the lowerend which may be regarded as a cup. The cup holds either ink or othersubstance suitable for the purpose, the object of the cup being tosupply the roller 14 which, in bearing against the studs 19 of the dotwheel 13, distributes the ink in an even and thin layer.

Portions 20 of the holder 17 arecut down and bent from the lip 21 inorder to provide a hinge mounting for the holder. These portions arebent around a screw or rivet 22 in the hinge support. The rivet 22 spansthe distance between the sides 4. The side plates are provided with apair of lugs 23 against which the holder 17 rests when in the forwardposition (Fig. 4) thereby limiting the movement of the holder toward theinking roller 14 and maintaining a properly spaced relationship of thecup 18 with that roller.

A spring 24 maintains the holder 17 either in the full line or operatingposition (Fig. 4) or in the dotted line or cleaning position (Fig. 1).The lip 21 has a perforation 25 through which the spring 24 passes, thefree extremity of the spring being curved downwardly in order to moreeffectively support the holder in the dotted line position and also. topermit the rearward swinging movement of the holder when in the cleaningposition.

Reference is made to the roller as having studs 19. It is these studsthat produce the dots when the instrument is drawn across the paper. Thedrawing illustrates the roller 13 as being almost as broad as the spacebetween the side plates 4 and the studs 19 as being numerous. A stud orvdot roller of this particular type will produce a broad band of dots. Itis readily conceivable, and in fact is intended to be regarded as partof the invention, to provide a supply of various widths of rollers 13having studs arranged in various kinds of groups and made to producevarious types of dots, the

various rollers being interchangeable according to particular needs.

The operation may readily be understood from the foregoing description.It is to be observed that the forward end of the side plate 4 nearestthe observer in Figures 1 and 4 extends rather far down toward the dotroller 13 thereby providing a guide WlllOll is intended to slide alongthe T-square or straight edge when using the instrument, therebypreventing the roller itself from contacting the straight edge and thusrestricting the rotation. It is optional whether both side plates beshaped alike in this particular respect, and for present purposes bothmay be regarded as being shaped alike so that the instrument may be usedeither by the right or left hand of the artist.

The instrument is filled with ink or color by simply placing the latterin the space between the inking roller 14 and the cup 18. The inkremains in place by capillary attraction much on the order that the inkremains in place between the blades of an or-- dinary ruling pen. Uponrunning the instrument along the edge of a T-square or the like, the dotor stud roller 13 being in contact with the paper, a rotation of bothrollers is set up, the contacting roller 14 spreading a thin layer'ofink over the studs 19 so that the dots are printed on the paper. A"forward pressure on the lip 21 swings the holder 17 backward (dottedlines in Figure 1) so that it may be cleaned. The ends of the inkingroller shaft 12 can 'be taken between two fingers of one hand and movedbackward out of the slots 10 for cleaning. If desired, the ends 16 ofthe springs 8 can be sprung to let the inking roller drop out. The dotroller 13 may be removed either by pulling on the shaft 11 or bydisplacing the arms 15 of the springs so that the roller may drop out.

lVhile the construction and arrangement of the improved drawinginstrument as herein described and claimed is that of a generallypreferred form, obviously modifications and'change may be made withoutdeparting from the spirit of the invention or the scope of the claims.

I claim 1. A drawing instrument comprising a handle, marking means whichis continuously revoluble upon movement of the instrument while incontact with a surface, an inking roller in contact with said means toink the same for the making of marks, and a holder terminating in acurved portion constituting a cup to contain a supply of ink into whichsaid inking roller dips.

2. A drawing instrument comprising a handle, marking means which iscontinuously revoluble upon movement of the in strument while in contactwith a surface, an inking roller in contact with said means to ink thesame for the making of marks, a holder terminating in a curved portionconstituting a cup to contain a su ply of ink into which said inkingroller dips, means for holding the cup in a predetermined relationshipto the inking roller, and means ineluding a spring for keeping theholder in contact with said holding means.

3. A drawing instrument comprising a handle, a head carried therebyincluding a plate, a roller having a prearranged assortment of studs toproduce a correspondingly figured indication upon a printing surface,meansincluding a shaft by which said roller is journaled upon the plate,an inking roller situated behind the stud roller and having contact withthe studs, means including a shaft by which said roller is journaledupon the same plate, ink'holdingmeans hinged'ly mounted upon said plateincluding a cup adjacent to the inking roller, means exerting pressureon the holding means tourge the cup toward said roller, and meanscarried by the plate for limiting the movement of the holder and cuptoward said roller.

l. A drawing instrument comprising a handle, a head carried therebyconsisting of a pair of side plates each having a pair of aligningslots, a studded roller having a shaft occupying one pair of slots,ac'ontacting inking roller having a shaftnecupying the other pair ofslots, means including a spring mounted on each plate havingsuitablyshaped portions to engage the shafts and hold them in theirrespective slots and means by which saidholding means are fixedlymounted upon said plates. 7

' 5. A drawing instrument comprising a i handle, a head carried therebyconsisting of a pair of plates each having a pair of slots in transversealignment, a studded roller having a shaft occupying one pair of slots,an inkingroller having a shaft occupying the other pair of slots, meansincluding substaaitially U-shaped inverted springs one leg of each ofwhich is bent to provide an arm to engage and held one of the shafts inthe respective slots, the other leg being substantially straight andengaging the other shaft to hold it in its slots, said shafts beingremovable against the tension of said springs, and ears bent up from therespective plates and fastened over portions of said springs to holdthem in fixed positions plates completing the hinge joint and providingthe mounting for the holder, a spring extending through said perforationand being curved at the extremity to more readily support the holder ineither an inking or cleaning. position, and means including lugs carriedby the plates for limiting the movement of the holder toward the inkingroller under the influence of said spring.

7. A drawing instrument comprislng a handle terminating in anenlargement, a pair of side plates afiixed to said enlargement includinga bridge holding them in spaced relationship, a dot-forming rollerjournaled between the lat/es, an inking roller journaled between t eplates and having contact with the dot-forming roller means forremovably supporting said rollers between the plates, means to supplythe inking roller with ink including a holder having a cup, means bywhich the holder is hingedly mounted between the plates, a spring fixedupon said enlargement and passing through a portion of the holder tosupport it either in an inking or cleaning position, and means carriedby the plate for limiting the movement of the holder toward the inkingroller while in the inking position.

8. A device of the character described comprising a handle, markingmeans, contacting inking means, and resilient means carried by thehandle revolubly supporting both simultaneously by virtue of beingresilient.

9. A device of the character described comprising a handle, markingmeans, contacting inking. means, and ink-holding means movably mountedupon said handle so that it may be swung toward and away from saidinking means.

10. A device of the character described comprising a handle, markingmeans having a shaft, contacting inking means having a shaft, and meanscarried by the handle contacting the ends of both shafts keeping them inposition upon the handle during rotational movement.

AKSEL THEODOR JESPERSEN.

